class_docstr: Index subclass for indexes backed by ExtensionArray.
class_docstr_tok: ["Index","subclass","for","indexes","backed","by","ExtensionArray","."]
docstr: Convert value to be insertable to underlying array.
docstr_tok: ["Convert","value","to","be","insertable","to","underlying","array","."]
code: def _validate_fill_value(self, value):
      """
      Convert value to be insertable to underlying array.
      """
      return self._data._validate_setitem_value(value)
  
file_path: catboost/contrib/python/pandas/py3/pandas/core/indexes/extension.py
imports: from __future__ import annotations
  from typing import TYPE_CHECKING, Callable, TypeVar
  import numpy
  from pandas._typing import ArrayLike, npt
  from pandas.util._decorators import cache_readonly, doc
  from pandas.core.dtypes.generic import ABCDataFrame
  from pandas.core.indexes.base import Index
label_desc: Use image node_id 1 for calling the ExtensionIndex obj's underlying member method code with example usage: obj._validate_fill_value(value) and returns: self